J/A+A/695/A195ivo://CDS.VizieR/J/A+A/695/A195doi:10.26093/cds/vizier.36950195CDSKarpov S.Malkov O.Avdeeva A.2025-07-30T20:01:16Z2025-03-19T07:33:44ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frbrown-dwarfsstellar-spectral-typesproper-motionsstellar-distanceThirty years after the discovery of brown dwarfs, the search for these objects continues, particularly in the vicinity of the Sun. Objects near the Sun are characterized by large proper motions, making them seen as fast-moving objects. While the Gaia DR3 catalogue is a comprehensive source of proper motions, it lacks the depth needed for discovering fainter objects. Modern multi-epoch surveys, with their greater depth, offer a new opportunity for systematic search for ultracool dwarfs. The study aims to systematically search for high proper motion objects using the newly released catalogue of epochal WISE data in order to identify new brown dwarf candidates in the solar neighborhood, estimate their spectral types, distances and spatial velocities. We used recently released unTimely catalogue of epochal detections in unWISE coadds to search for objects with high proper motions using simple motion detection algorithm, combined with machine learning based artefact rejection routine. This method was used to identify objects with proper motions exceeding approximately 0.3 arcseconds per year. The identified objects were then cross-referenced with data from other large-scale sky surveys to further analyze their characteristics. The search yielded 21885 moving objects with significant proper motions, 258 of which had not been previously published. All except 6 of them are compatible with being ultracool dwarfs. Among these, at least 33 were identified as most promising new T dwarf candidates, with estimated distances closer than about 40 parsecs, and effective temperatures less than 1300K.2025A&A...695A.195Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/695/A195CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)II/365 : The CatWISE2020 catalog (updated version 28-Jan-2021) (Marocco+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/695/A195https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/695/A195http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/695/A195https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/695/A195https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/695/A195http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/695/A195GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/695/A195/table2 (New high-proper-motion objects detected in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/695/A195/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/695/A195/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/695/A195/table2?GETtext/xml+votable180.050000true19.5682978260522-72.65497403791540.0055555555555555566/489 595 664 865 1204 1394 1597 1920 2083 2211 2330 2351 2394 2516 2662 2674 2688 2718 2826 3495 3754 3791 3887 4001 4024 4263 4431 4452 5194 5222 5414 5480 5531 5536 5591 5765 5887 5972 5981 6014 6451 6485 6988 7128 7132 7506 7516 7831 7838 8026 8141 8821 8845 8872 8913 8942 9005 9081 9118 9136 9301 9695 9928 10556 10579 10583 10682 10970 11120 11190 11201 11251 11359 11364 11566 11586 11932 12039 12630 12633 12659 12706 12751 13168 13470 13513 13771 14132 14151 14943 15012 15184 15334 15702 15742 15762 15766 15787 15820 16087 16119 16142 16174 16177 16548 16717 16811 17124 17198 17237 17549 17705 17923 18461 18658 19074 19461 19630 19904 19964 20071 20136 20946 20990 21674 21815 22904 22977 23200 23405 23884 23993 24007 24721 24929 25207 25281 25524 25608 25621 25648 26481 26865 27137 27400 28220 28501 28601 29139 29592 29828 29893 29948 30037 30152 30812 31183 31344 31646 31872 32535 32715 32896 33014 33035 33151 33305 33427 33526 33546 33549 33984 34067 35064 35088 35266 35834 36890 36945 36954 37004 37117 37175 37197 37218 37360 37407 37614 37835 38393 38493 38778 38979 39020 39046 40249 41017 41100 41206 41289 41599 41709 41958 42298 42466 42796 42898 42992 43038 43461 43496 43501 43726 43746 43818 43954 43980 44645 44662 44695 44739 44769 44861 44871 44874 45124 45314 45459 45653 45831 45910 45960 46455 46802 46842 46881 46966 46980 46986 47024 47160 47176 47215 47385 47417 47669 47692 47708 47795 47900 47999 48035 48432 48470 486133.830199579824256e-20 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/695/A195?format=asciidefaultJ/A+A/695/A195/table2New high-proper-motion objects detected in this workiSDSS? SDSS DR16 i band magnitudemagphot.mag;em.opt.Idoublenullablee_iSDSS? Error of iSDSSmagstat.errordoublenullable_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight ascension (ICRS) at Ep=J2016.0degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=J2016.0degpos.eq.dec;meta.mainpmRAProper motion in Right ascensionarcsec/yrpos.pm;pos.eq.radoublee_pmRAError of pmRAarcsec/yrstat.error;pos.pm;pos.eq.radoublepmDEProper motion in Declinationarcsec/yrpos.pm;pos.eq.decdoublee_pmDEError of pmDEarcsec/yrstat.error;pos.pm;pos.eq.decdoublePMProper motionarcsec/yrpos.pmdoublee_PMError of PMarcsec/yrstat.errordoubleW1WISE W1 band magnitudemagphot.mag;em.IR.3-4umdoublee_W1Error of W1magstat.errordoubleW2WISE W2 band magnitudemagphot.mag;em.IR.4-8umdoublee_W2Error of W2magstat.errordoubleuSMSS? SkyMapper DR4 u band magnitudemagphot.mag;em.opt.Udoublenullablee_uSMSS? Error of uSMSSmagstat.errordoublenullablegDELVE? DELVE DR2 g band magnitudemagphot.mag;em.opt.Bdoublenullablee_gDELVE? Error of gDELVEmagstat.errordoublenullablegNSC? NSC DR2 g band magnitudemagphot.mag;em.opt.Bdoublenullablee_gNSC? Error of gNSCmagstat.errordoublenullablegPS1? PanSTARRS DR2 g band magnitudemagphot.mag;em.opt.Bdoublenullablee_gPS1? Error of gPS1magstat.errordoublenullablegSDSS? SDSS DR16 g band magnitudemagphot.mag;em.opt.Bdoublenullablee_gSDSS? Error of gSDSSmagstat.errorfloatnullablegSMSS? SkyMapper DR4 g band magnitudemagphot.mag;em.opt.Bdoublenullablee_gSMSS? Error of gSMSSmagstat.errordoublenullablerDELVE? DELVE DR2 r band magnitudemagphot.mag;em.opt.Rdoublenullablee_rDELVE? Error of rDELVEmagstat.errordoublenullablerNSC? NSC DR2 r band magnitudemagphot.mag;em.opt.Rdoublenullablee_rNSC? Error of rNSCmagstat.errordoublenullablerPS1? PanSTARRS DR2 r band magnitudemagphot.mag;em.opt.Rdoublenullablee_rPS1? Error of rPS1magstat.errordoublenullablerSMSS? SkyMapper DR4 r band magnitudemagphot.mag;em.opt.Rdoublenullablee_rSMSS? Error of rSMSSmagstat.errordoublenullableiDELVE? DELVE DR2 i band magnitudemagphot.mag;em.opt.Idoublenullablee_iDELVE? Error of iDELVEmagstat.errordoublenullableiNSC? NSC DR2 i band magnitudemagphot.mag;em.opt.Idoublenullablee_iNSC? Error of iNSCmagstat.errordoublenullableiPS1? PanSTARRS DR2 i band magnitudemagphot.mag;em.opt.Idoublenullablee_iPS1? Error of iPS1magstat.errordoublenullableiSMSS? SkyMapper DR4 i band magnitudemagphot.mag;em.opt.Idoublenullablee_iSMSS? Error of iSMSSmagstat.errordoublenullablezDELVE? DELVE DR2 z band magnitudemagphot.mag;em.opt.Idoublenullablee_zDELVE? Error of zDELVEmagstat.errordoublenullablezNSC? NSC DR2 z band magnitudemagphot.mag;em.opt.Idoublenullablee_zNSC? Error of zNSCmagstat.errordoublenullablezPS1? PanSTARRS DR2 z band magnitudemagphot.mag;em.opt.Idoublenullablee_zPS1? Error of zPS1magstat.errordoublenullablezSDSS? SDSS DR16 z band magnitudemagphot.mag;em.opt.Idoublenullablee_zSDSS? Error of zSDSSmagstat.errordoublenullablezSMSS? SkyMapper DR4 z band magnitudemagphot.mag;em.opt.Idoublenullablee_zSMSS? Error of zSMSSmagstat.errordoublenullableyPS1? PanSTARRS DR2 y band magnitudemagphot.mag;em.IR.Jdoublenullablee_yPS1? Error of yPS1magstat.errordoublenullableYNSC? NSC DR2 Y band magnitudemagphot.mag;em.IR.Jdoublenullablee_YNSC? Error of YNSCmagstat.errordoublenullableYVHS? VHS DR5 Y band magnitudemagphot.mag;em.IR.Jdoublenullablee_YVHS? Error of YVHSmagstat.errordoublenullableIDENIS? DENIS I band magnitudemagphot.mag;em.opt.Idoublenullablee_IDENIS? Error of IDENISmagstat.errordoublenullableJ2MASS? 2MASS J band magnitudemagphot.mag;em.IR.Jdoublenullablee_J2MASS? Error of J2MASSmagstat.errordoublenullableJDENIS? DENIS J band magnitudemagphot.mag;em.IR.Jdoublenullablee_JDENIS? Error of JDENISmagstat.errordoublenullableJUHS? UHS DR2 J band magnitudemagphot.mag;em.IR.Jdoublenullablee_JUHS? Error of JUHSmagstat.errordoublenullableJVHS? VHS DR5 J band magnitudemagphot.mag;em.IR.Jdoublenullablee_JVHS? Error of JVHSmagstat.errordoublenullableH2MASS? 2MASS H band magnitudemagphot.mag;em.IR.Hdoublenullablee_H2MASS? Error of H2MASSmagstat.errordoublenullableHVHS? VHS DR5 H band magnitudemagphot.mag;em.IR.Hdoublenullablee_HVHS? Error of HVHSmagstat.errordoublenullableK2MASS? 2MASS K band magnitudemagphot.mag;em.IR.Kdoublenullablee_K2MASS? Error of K2MASSmagstat.errordoublenullableKDENIS? DENIS K band magnitudemagphot.mag;em.IR.Kdoublenullablee_KDENIS? Error of KDENISmagstat.errordoublenullableKUHS? UHS DR2 K band magnitudemagphot.mag;em.IR.Kdoublenullablee_KUHS? Error of KUHSmagstat.errordoublenullableKsVHS? VHS DR5 Ks band magnitudemagphot.mag;em.IR.Kdoublenullablee_KsVHS? Error of KsVHSmagstat.errordoublenullableTeff? Effective temperatureKphys.temperature.effectivedoublenullablee_Teff? Error of TeffKstat.error;phys.temperature.effectivedoublenullableSpTypeEstimated spectral typesrc.spTypecharb_SpTypeLower bound on spectral typesrc.spType;stat.mindoubleB_SpTypeUpper bound on spectral typesrc.spType;stat.maxdoubleSpMet[0/2] Method used to derive spectral typemeta.noteintSpMetStrMethod used to derive spectral typemeta.notecharDistEstimated distancepcpos.distancedoublee_DistError of distpcstat.errordoubleVtanEstimated tangential velocitykm/sphys.veloc.transversedoublee_VtanError of vtankm/sstat.errordoubleCandidCandidate ID from unTimelymeta.id;meta.maincharCWISECandidate ID from CatWISE2020, JHHMMSS.ss+DDMMSS.smeta.idchar